26 citations · 118 across the 10 of their papers we have counts for
11 papers
Dynamic Tilting of Ferroelectric Domain Walls via Optically Induced Electronic Screening
Youngjun Ahn, Arnoud S. Everhardt, Hyeon Jun Lee +8
Optical excitation perturbs the balance of phenomena selecting the tilt orientation of domain walls within ferroelectric thin films. The high carrier density induced in a low-strai…
Combining Laue diffraction with Bragg coherent diffraction imaging at 34-ID-C
Anastasios Pateras, Ross Harder, Wonsuk Cha +10
Measurement modalities in Bragg coherent diffraction imaging (BCDI) rely on finding signal from a single nanoscale crystal object, which satisfies the Bragg condition among a large…
Dynamical Scattering in Coherent Hard X-Ray Nanobeam Bragg Diffraction
A. Pateras, J. Park, Y. Ahn +5
Unique intensity features arising from dynamical diffraction arise in coherent x-ray nanobeam diffraction patterns of crystals having thicknesses larger than the x-ray extinction d…
Stressor-Layer-Induced Elastic Strain Sharing in SrTiO3 Complex Oxide Sheets
J. A. Tilka, J. Park, Y. Ahn +3
A precisely selected elastic strain can be introduced in submicron-thick single-crystal SrTiO3 sheets using a silicon nitride stressor layer. A conformal stressor layer deposited u…
Domain alignment within ferroelectric/dielectric PbTiO/SrTiO superlattice nanostructures
J. Park, J. Mangeri, Q. Zhang +7
The ferroelectric domain pattern within lithographically defined PbTiO3/SrTiO3 ferroelectric/dielectric heteroepitaxial superlattice nanostructures is strongly influenced by the ed…
Mesoscopic Elastic Distortions in GaAs Quantum Dot Heterostructures
Anastasios Pateras, Joonkyu Park, Youngjun Ahn +9
Quantum devices formed in high-electron-mobility semiconductor heterostructures provide a route through which quantum mechanical effects can be exploited on length scales accessibl…
Role of temperature-dependent electron trapping dynamics in the optically driven nanodomain transformation in a PbTiO/SrTiO superlattice
Joonkyu Park, Youngjun Ahn, Jack A. Tilka +6
The spontaneously formed striped polarization nanodomain configuration of a PbTiO/SrTiO superlattice transforms to a uniform polarization state under above-bandgap illu…
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging: Part 2
Peng Li, Siddharth Maddali, Anastasios Pateras +4
X-ray Bragg coherent diffraction imaging has been demonstrated as a powerful three-dimensional (3D) microscopy approach for the investigation of sub-micrometer-scale crystalline pa…
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging: Part 1
Siddharth Maddali, Peng Li, Anastasios Pateras +12
In this two-part article series we provide a generalized description of the scattering geometry of Bragg coherent diffraction imaging (BCDI) experiments, the shear distortion effec…
Nanosecond Optically Induced Phase Transformation in Compressively Strained BiFeO3 on LaAlO3
Youngjun Ahn, Anastasios Pateras, Samuel D. Marks +9
Above-bandgap optical illumination induces a transformation from tilted tetragonal-like (T-like) and rhombohedral-like (R-like) phases to an untilted T-like phase in compressively…
Photoinduced Domain Pattern Transformation in Ferroelectric/Dielectric Superlattices
Youngjun Ahn, Joonkyu Park, Anastasios Pateras +7
The nanodomain pattern in ferroelectric/dielectric superlattices transforms to a uniform polarization state under above-bandgap optical excitation. X-ray scattering reveals a disap…